[vlc-devel] [PATCH 2/2] Implement filesystem.c and plugin.c for OS/2
KO Myung-Hun
komh78 at gmail.com
Sun Apr 29 14:50:25 CEST 2012
---
src/Makefile.am | 4 +-
src/os2/filesystem.c | 392 ++++++++++++++++++++++++++++++++++++++++++++++++++
src/os2/plugin.c | 94 ++++++++++++
3 files changed, 488 insertions(+), 2 deletions(-)
create mode 100644 src/os2/filesystem.c
create mode 100644 src/os2/plugin.c
diff --git a/src/Makefile.am b/src/Makefile.am
index 9ab1ca6..8fd77b2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -282,8 +282,8 @@ SOURCES_libvlc_os2 = \
os2/getaddrinfo.c \
os2/dirs.c \
misc/atomic.c \
- posix/filesystem.c \
- posix/plugin.c \
+ os2/filesystem.c \
+ os2/plugin.c \
os2/thread.c \
os2/specific.c \
os2/rand.c \
diff --git a/src/os2/filesystem.c b/src/os2/filesystem.c
new file mode 100644
index 0000000..e8ce42a
--- /dev/null
+++ b/src/os2/filesystem.c
@@ -0,0 +1,392 @@
+/*****************************************************************************
+ * filesystem.c: OS/2 file system helpers
+ *****************************************************************************
+ * Copyright (C) 2005-2006 VLC authors and VideoLAN
+ * Copyright © 2005-2008 Rémi Denis-Courmont
+ * Copyright (C) 2012 KO Myung-Hun
+ *
+ * Authors: Rémi Denis-Courmont <rem # videolan.org>
+ * KO Myung-Hun <komh at chollian.net>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <assert.h>
+
+#include <stdio.h>
+#include <errno.h>
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <sys/socket.h>
+
+#include <vlc_common.h>
+#include <vlc_charset.h>
+#include <vlc_fs.h>
+#include "libvlc.h" /* vlc_mkdir */
+
+/**
+ * Opens a system file handle.
+ *
+ * @param filename file path to open (with UTF-8 encoding)
+ * @param flags open() flags, see the C library open() documentation
+ * @return a file handle on success, -1 on error (see errno).
+ * @note Contrary to standard open(), this function returns file handles
+ * with the close-on-exec flag enabled.
+ */
+int vlc_open (const char *filename, int flags, ...)
+{
+ unsigned int mode = 0;
+ va_list ap;
+
+ va_start (ap, flags);
+ if (flags & O_CREAT)
+ mode = va_arg (ap, unsigned int);
+ va_end (ap);
+
+ const char *local_name = ToLocale (filename);
+
+ if (local_name == NULL)
+ {
+ errno = ENOENT;
+ return -1;
+ }
+
+ int fd = open (local_name, flags, mode);
+ if (fd != -1)
+ fcntl (fd, F_SETFD, FD_CLOEXEC);
+
+ LocaleFree (local_name);
+ return fd;
+}
+
+/**
+ * Opens a system file handle relative to an existing directory handle.
+ *
+ * @param dir directory file descriptor
+ * @param filename file path to open (with UTF-8 encoding)
+ * @param flags open() flags, see the C library open() documentation
+ * @return a file handle on success, -1 on error (see errno).
+ * @note Contrary to standard open(), this function returns file handles
+ * with the close-on-exec flag enabled.
+ */
+int vlc_openat (int dir, const char *filename, int flags, ...)
+{
+ errno = ENOSYS;
+
+ return -1;
+}
+
+
+/**
+ * Creates a directory using UTF-8 paths.
+ *
+ * @param dirname a UTF-8 string with the name of the directory that you
+ * want to create.
+ * @param mode directory permissions
+ * @return 0 on success, -1 on error (see errno).
+ */
+int vlc_mkdir (const char *dirname, mode_t mode)
+{
+ char *locname = ToLocale (dirname);
+ if (unlikely(locname == NULL))
+ {
+ errno = ENOENT;
+ return -1;
+ }
+
+ int res = mkdir (locname, mode);
+ LocaleFree (locname);
+ return res;
+}
+
+/**
+ * Opens a DIR pointer.
+ *
+ * @param dirname UTF-8 representation of the directory name
+ * @return a pointer to the DIR struct, or NULL in case of error.
+ * Release with standard closedir().
+ */
+DIR *vlc_opendir (const char *dirname)
+{
+ const char *locname = ToLocale (dirname);
+ if (unlikely(locname == NULL))
+ {
+ errno = ENOENT;
+ return NULL;
+ }
+
+ DIR *dir = opendir (locname);
+
+ LocaleFree (locname);
+
+ return dir;
+}
+
+/**
+ * Reads the next file name from an open directory.
+ *
+ * @param dir The directory that is being read
+ *
+ * @return a UTF-8 string of the directory entry. Use free() to release it.
+ * If there are no more entries in the directory, NULL is returned.
+ * If an error occurs, errno is set and NULL is returned.
+ */
+char *vlc_readdir( DIR *dir )
+{
+ /* Beware that readdir_r() assumes <buf> is large enough to hold the result
+ * dirent including the file name. A buffer overflow could occur otherwise.
+ * In particular, pathconf() and _POSIX_NAME_MAX cannot be used here. */
+ struct dirent *ent;
+ char *path = NULL;
+
+ long len = fpathconf (dirfd (dir), _PC_NAME_MAX);
+ len += offsetof (struct dirent, d_name) + 1;
+ /* In the implementation of Innotek LIBC, aka kLIBC on OS/2,
+ * fpathconf (_PC_NAME_MAX) is broken, and d_name is not the last member
+ * of struct dirent.
+ * So just allocate as many as the size of struct dirent. */
+ len += sizeof (struct dirent);
+
+ struct dirent *buf = malloc (len);
+ if (unlikely(buf == NULL))
+ return NULL;
+
+ int val = readdir_r (dir, buf, &ent);
+ if (val != 0)
+ errno = val;
+ else if (ent != NULL)
+ path = FromLocaleDup (ent->d_name);
+ free (buf);
+ return path;
+}
+
+static int vlc_statEx (const char *filename, struct stat *buf, bool deref)
+{
+ const char *local_name = ToLocale (filename);
+ if (unlikely(local_name == NULL))
+ {
+ errno = ENOENT;
+ return -1;
+ }
+
+ int res = deref ? stat (local_name, buf)
+ : lstat (local_name, buf);
+ LocaleFree (local_name);
+ return res;
+}
+
+/**
+ * Finds file/inode information, as stat().
+ * Consider using fstat() instead, if possible.
+ *
+ * @param filename UTF-8 file path
+ */
+int vlc_stat (const char *filename, struct stat *buf)
+{
+ return vlc_statEx (filename, buf, true);
+}
+
+/**
+ * Finds file/inode information, as lstat().
+ * Consider using fstat() instead, if possible.
+ *
+ * @param filename UTF-8 file path
+ */
+int vlc_lstat (const char *filename, struct stat *buf)
+{
+ return vlc_statEx (filename, buf, false);
+}
+
+/**
+ * Removes a file.
+ *
+ * @param filename a UTF-8 string with the name of the file you want to delete.
+ * @return A 0 return value indicates success. A -1 return value indicates an
+ * error, and an error code is stored in errno
+ */
+int vlc_unlink (const char *filename)
+{
+ const char *local_name = ToLocale (filename);
+ if (unlikely(local_name == NULL))
+ {
+ errno = ENOENT;
+ return -1;
+ }
+
+ int ret = unlink (local_name);
+ LocaleFree (local_name);
+ return ret;
+}
+
+/**
+ * Moves a file atomically. This only works within a single file system.
+ *
+ * @param oldpath path to the file before the move
+ * @param newpath intended path to the file after the move
+ * @return A 0 return value indicates success. A -1 return value indicates an
+ * error, and an error code is stored in errno
+ */
+int vlc_rename (const char *oldpath, const char *newpath)
+{
+ const char *lo = ToLocale (oldpath);
+ if (lo == NULL)
+ goto error;
+
+ const char *ln = ToLocale (newpath);
+ if (ln == NULL)
+ {
+ LocaleFree (lo);
+error:
+ errno = ENOENT;
+ return -1;
+ }
+
+ int ret = rename (lo, ln);
+ LocaleFree (lo);
+ LocaleFree (ln);
+ return ret;
+}
+
+/**
+ * Determines the current working directory.
+ *
+ * @return the current working directory (must be free()'d)
+ * or NULL on error
+ */
+char *vlc_getcwd (void)
+{
+ /* Try $PWD */
+ const char *pwd = getenv ("PWD");
+ if (pwd != NULL)
+ {
+ struct stat s1, s2;
+ /* Make sure $PWD is correct */
+ if (stat (pwd, &s1) == 0 && stat (".", &s2) == 0
+ && s1.st_dev == s2.st_dev && s1.st_ino == s2.st_ino)
+ return ToLocaleDup (pwd);
+ }
+
+ /* Otherwise iterate getcwd() until the buffer is big enough */
+ long path_max = pathconf (".", _PC_PATH_MAX);
+ size_t size = (path_max == -1 || path_max > 4096) ? 4096 : path_max;
+
+ for (;; size *= 2)
+ {
+ char *buf = malloc (size);
+ if (unlikely(buf == NULL))
+ break;
+
+ if (getcwd (buf, size) != NULL)
+ {
+ char *ret = ToLocaleDup (buf);
+ free (buf);
+ return ret; /* success */
+ }
+ free (buf);
+
+ if (errno != ERANGE)
+ break;
+ }
+ return NULL;
+}
+
+/**
+ * Duplicates a file descriptor. The new file descriptor has the close-on-exec
+ * descriptor flag set.
+ * @return a new file descriptor or -1
+ */
+int vlc_dup (int oldfd)
+{
+ int newfd;
+
+ newfd = dup (oldfd);
+ if (likely(newfd != -1))
+ fcntl (newfd, F_SETFD, FD_CLOEXEC);
+
+ return newfd;
+}
+
+/**
+ * Creates a pipe (see "man pipe" for further reference).
+ */
+int vlc_pipe (int fds[2])
+{
+ if (pipe (fds))
+ return -1;
+
+ fcntl (fds[0], F_SETFD, FD_CLOEXEC);
+ fcntl (fds[1], F_SETFD, FD_CLOEXEC);
+ return 0;
+}
+
+#include <vlc_network.h>
+
+/**
+ * Creates a socket file descriptor. The new file descriptor has the
+ * close-on-exec flag set.
+ * @param pf protocol family
+ * @param type socket type
+ * @param proto network protocol
+ * @param nonblock true to create a non-blocking socket
+ * @return a new file descriptor or -1
+ */
+int vlc_socket (int pf, int type, int proto, bool nonblock)
+{
+ int fd;
+
+ fd = socket (pf, type, proto);
+ if (fd == -1)
+ return -1;
+
+ fcntl (fd, F_SETFD, FD_CLOEXEC);
+ if (nonblock)
+ fcntl (fd, F_SETFL, fcntl (fd, F_GETFL, 0) | O_NONBLOCK);
+ return fd;
+}
+
+/**
+ * Accepts an inbound connection request on a listening socket.
+ * The new file descriptor has the close-on-exec flag set.
+ * @param lfd listening socket file descriptor
+ * @param addr pointer to the peer address or NULL [OUT]
+ * @param alen pointer to the length of the peer address or NULL [OUT]
+ * @param nonblock whether to put the new socket in non-blocking mode
+ * @return a new file descriptor, or -1 on error.
+ */
+int vlc_accept (int lfd, struct sockaddr *addr, socklen_t *alen, bool nonblock)
+{
+ do
+ {
+ int fd = accept (lfd, addr, alen);
+ if (fd != -1)
+ {
+ fcntl (fd, F_SETFD, FD_CLOEXEC);
+ if (nonblock)
+ fcntl (fd, F_SETFL, fcntl (fd, F_GETFL, 0) | O_NONBLOCK);
+ return fd;
+ }
+ }
+ while (errno == EINTR);
+
+ return -1;
+}
diff --git a/src/os2/plugin.c b/src/os2/plugin.c
new file mode 100644
index 0000000..c16b827
--- /dev/null
+++ b/src/os2/plugin.c
@@ -0,0 +1,94 @@
+/*****************************************************************************
+ * plugin.c : Low-level dynamic library handling
+ *****************************************************************************
+ * Copyright (C) 2001-2007 VLC authors and VideoLAN
+ * Copyright (C) 2012 KO Myung-Hun
+ * $Id$
+ *
+ * Authors: Sam Hocevar <sam at zoy.org>
+ * Ethan C. Baldridge <BaldridgeE at cadmus.com>
+ * Hans-Peter Jansen <hpj at urpla.net>
+ * Gildas Bazin <gbazin at videolan.org>
+ * KO Myung-Hun <komh at chollian.net>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_charset.h>
+#include "modules/modules.h"
+
+#include <sys/types.h>
+#include <dlfcn.h>
+
+/**
+ * Load a dynamically linked library using a system dependent method.
+ *
+ * \param p_this vlc object
+ * \param psz_file library file
+ * \param p_handle the module handle returned
+ * \return 0 on success as well as the module handle.
+ */
+int module_Load( vlc_object_t *p_this, const char *psz_file,
+ module_handle_t *p_handle, bool lazy )
+{
+ const int flags = lazy ? RTLD_LAZY : RTLD_NOW;
+ char *path = ToLocale( psz_file );
+
+ module_handle_t handle = dlopen( path, flags );
+ if( handle == NULL )
+ {
+ msg_Warn( p_this, "cannot load module `%s' (%s)", path, dlerror() );
+ LocaleFree( path );
+ return -1;
+ }
+ LocaleFree( path );
+ *p_handle = handle;
+ return 0;
+}
+
+/**
+ * CloseModule: unload a dynamic library
+ *
+ * This function unloads a previously opened dynamically linked library
+ * using a system dependent method. No return value is taken in consideration,
+ * since some libraries sometimes refuse to close properly.
+ * \param handle handle of the library
+ * \return nothing
+ */
+void module_Unload( module_handle_t handle )
+{
+ dlclose( handle );
+}
+
+/**
+ * Looks up a symbol from a dynamically loaded library
+ *
+ * This function queries a loaded library for a symbol specified in a
+ * string, and returns a pointer to it. We don't check for dlerror() or
+ * similar functions, since we want a non-NULL symbol anyway.
+ *
+ * @param handle handle to the module
+ * @param psz_function function name
+ * @return NULL on error, or the address of the symbol
+ */
+void *module_Lookup( module_handle_t handle, const char *psz_function )
+{
+ return dlsym( handle, psz_function );
+}
--
1.7.3.2
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